Spring base for a rocking chair



FIG. 1 is an upper perspective view of the spring base for a rocking chair showing my design.

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a sectional view thereof taken along line 8-8 of FIG. 2; and,

FIG. 9 is a sectional view thereof taken along line 8-8 of FIG. 2, showing an alternate embodiment having two springs.

The features presented in broken lines are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a spring base for a rocking chair, as shown and described. 